How to remove all partitions on an USB stick / SD card

A user just leaved a comment in another posting regarding USB sticks that he isn´t any longer able to remove all partitions on his USB stick / SD card. He see multiple partitions but is unable to delete them.

4.) In the case above we would like to remove every partition on disk 2 and 3. Keep noted that if you select the wrong disk here, you might kill everything on it. So make sure you are using the correct one via: